Description:
-These ceramic bearing balls are great for applications were there will be extreme rotation and a premium performance bearing ball is required to meet the demands.
-Lighter and stronger than tungsten carbide, these silicon nitride balls are diamond polished, will not shatter or melt in the extreme conditions.
-Higher hardness than chrome steel balls. Vickers hardness up to 1700HV.
-Specially useful for casters, drawer slides, door locks and many other applications.

Suitable for a range of purposes, some of the most common are listed below:
-1/8" is often used for clusters and old English-style headsets
-1/4" is often used for rear wheels and bottom brackets
-3/16" is often used for front wheels
-5/32" is often used for headsets with pressing cups

Specification:
Size: 2.5mm
Precision: G5
Material: Silicon Nitride (Si3N4)
Package Content: 10 Piece